#include <iostream>
#include <algorithm>
using namespace std;
 
int main()
{
    double a = 0, b = 0, c = 0;
    while(cin >> a >> b >> c)
    {
        double arr[3] = {a, b, c};
        sort(arr, arr + 3);
 
        if(arr[0] + arr[1] > arr[2])
            cout << "Yes" << endl;
        else
            cout << "No" << endl;
    }
}